<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <script>
        function Student(name) {
            this.name = name;
        }

        Student.prototype = {
            constructor: Student,
            say: function() {
                console.log("say")
            },
            eat: function () {
                console.log("eat")
            },
            sleep: function() {
                console.log("sleep")
            },
            study: function() {
                console.log("study")
            }
        }

        var stu = new Student("张三");
        console.log(stu)
    </script>
</body>
</html>